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CAIE A-Level Chemistry AS 11.2.2 Reactions of the Elements with Hydrogen Questions

Practise describing halogen reactions with hydrogen and comparing how readily chlorine, bromine and iodine react.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • write H2 + X2 → 2HX and use the correct hydrogen halide formula for the chosen halogen
  • describe disappearance of the halogen colour, such as green chlorine or purple iodine vapour
  • compare reaction vigour down the group without confusing it with hydrogen-halide stability

CAIE A-Level Chemistry AS 11.2.2 Reactions of the Elements with Hydrogen Questions question 1

[Maximum number: 1]

Which statement relating to the elements in Group 17 and their compounds is correct?

A

Bromine will reduce KI to form iodine.

B

Iodide ions react to form a white precipitate when added to silver nitrate solution.

C

Bromide ions react to form a white precipitate when added to silver nitrate solution.

D

Chlorine reacts with hydrogen to form a colourless gas.

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